CFPS Special Hazard Suppression 4

Question 1

Which NFPA standard governs fixed dry chemical fire extinguishing systems?

Accepted Answer

NFPA 17

Answer

NFPA 15

Answer

NFPA 16

Answer

NFPA 750

Question 2

Wet chemical extinguishing systems installed in commercial cooking hoods must comply with:

Accepted Answer

NFPA 17A (wet chemical standard)

Answer

NFPA 17 (dry chemical standard)

Answer

NFPA 96 ventilation chapters only

Answer

NFPA 13 sprinkler standard

Question 3

Potassium bicarbonate (Purple-K) dry chemical extinguishes fires primarily through:

Accepted Answer

Chain reaction interruption (chemical flame inhibition)

Answer

Physical cooling of the burning material

Answer

Smothering by forming a crust over the fuel surface

Answer

Fuel separation from ignition sources

Question 4

In commercial kitchen wet chemical systems, the agent suppresses grease fires partly through a process called saponification, which involves:

Accepted Answer

Reacting with cooking oils to form a soapy foam that seals and cools the grease surface

Answer

Rapid vaporization that displaces oxygen above the fryer

Answer

Chemical breakdown of free radicals in the combustion zone

Answer

Oxidizing the fuel surface to prevent re-ignition

Question 5

Fixed dry chemical systems are generally NOT recommended for areas containing:

Accepted Answer

Delicate electronic equipment and sensitive instrumentation

Answer

Class B flammable liquid storage tanks

Answer

Energized Class C electrical equipment

Answer

Class A ordinary combustibles in industrial spaces

Question 6

The maximum ambient storage temperature typically specified for standard dry chemical agent cylinders is:

Accepted Answer

150°F (66°C)

Answer

120°F (49°C)

Answer

130°F (54°C)

Answer

100°F (38°C)

Question 7

Multipurpose ABC dry chemical extinguishing agent contains which primary active ingredient?

Accepted Answer

Monoammonium phosphate

Answer

Sodium bicarbonate

Answer

Potassium bicarbonate (Purple-K)

Answer

Potassium chloride